Internal-combustion motor



Ap' 14,- 192s. *1,533,454

M. H. PREZv INTERNAL COMBUSTION MOTOR Filed Nov. 2o. 192s a Sheets-sheet 1 l w W w w A -Ff K INVENTOR, yamlmzeo'fez, BY

ATTORNEY.

April 14, 1925.

M. H. PREZ l AIMI-:mman coMBUsTloN Mo'ron Fil'eduov. 20, i923 2 sheets-sheet 2 A TTORNEY.

Patented Apr. 14, 1925.

UNITED STATES g,Pa'ri-:Nr- OFFICE.

`MANUEL HUMBERTO rREz, or san rannoI sULA, HONDURAS.

` INTERNALOOMBUSTION MOTOR..

Application filed November 20,1923. ASeria1`No. 675,926.

To all @einem t may concern.'

Be it known that I, MANUEL HUMBERTO PREZ, a citizen of the Republic of Honduras, residing at San Pedro Sula, in the `Department of Cortez and Republic of Honduras, have invented new and useful Improvements in Internal-Combustion Motors, of which the following is a specification.

This invention relates to improvements in motors of the internal combustion type, and particularly to motors in which the working pistons operate in pairs and are so arranged and timed in action as to deliver their working impulses so as to maintain a continuity of mot-ion and avoid dead centers.

The object of the invention is to provide novel means for transmitting the working impulses of sets of pistons to an element to be driven, and for regulating the speed of the part to be driven as may be desired.

l/Vith these and other objects in view, the invention consists of the features! of construction, combination and arrangement of parts, hereinafter fully described and claimed, reference beine' had to the accompanying drawings, in which Figure 1 is a vertical longitudinal section through the motor on the line -m of `Figure 2. j

Figure 2 is a horizontal section through the motor on the line g/-y/ of Figure 1.

The motor in the form shown comprises an enclosing casing 1 divided on a horizontal line to provide upper and lower casing sections 2 and 3 united by bolts or other suitable fastenings 1. rlhe'bottom casing section 3 and base of the top4 casino' section 2 form a crank casing or chamber 5 closed. by an integral bottom ,head 6. A detachable head 7 closes the top of the casing section 2, and forms with an underlying partition 8 a water jacket space 9, which in practice may be connected in the usual or preferred manner with any ordinary type of radiator.

In practice the motor may be equipped with any desired number of cylinders and pistons, arranged in working pairs, the cylinders of each lpair being disposed in parallel relation for working coaction with each other. The motor disclosed is designed to be provided with four cylinders 11 and cooperating pistons 12, arranged in working pairs on opposite sides of the longitudinal center of the engine, one pair of working cylinders and pistons only located at one side of the engine being' shown, it being understood `thaty such arrangement in practice is duplicated at the Opposite side of the engine, each pair of pistons being operatively arranged to transmit working motion through connecting rods 88 to a. crank sha-ft 18. As shown clearly in Figure 2, the two crank shafts 18 are arranged in parallel relation and extend longitudinally of the crank easing 5 and are journaled in bearings between the keyed thereto at one end a gear element 19 embodying relatively small and large gears 20 and 21 meshing respectively with comparatively large and small transmission gears 22 and 23 rot-ating about a stationary shaft 24 and suitably journaled on the engine casing and on said driven shaft. Loosely mounted to slide and rotate upon shaft 24 is a sleeve or hollow shaft 25 carrying a friction cone or gear 26 slida'bly movable in opposite directions to engage cone surfaces on the gear members 22 and 23, whereby a change speed gearing is provided adjustable for driving a driven or power transmitting shaft 24 at different speeds from the shafts 18, and foralso ensuring the revolution of the shafts 18 at the same speed so as to properly time the working motions of the pistons. Sleeve 25 is feathered to shaft 24: to slide thereon and rotate therewith. Any suitable type of shifting means may be coupled to the sleeve 25 for the purpose of adjusting the same'back and forth for achange speed action, such as a conventional type of shifter fragnu-ntai-ily shown at 2l" in Figure Having thus fully described my invention, I claim:

1. A motor comprising' a casing, sets of cylinders on opposite sides of the center of the casing, cylinders, shafts on opposite sides of the center of the casing and driven respectively by the respective sets of pistons, high and low speed gears carried vby said shafts, a driven shaft having a gear thereon, and intermediate loose gears: meshing'with the high and low speed gears on the respective piston driven shafts andadapted to be fixed for engagement with the gear on the driven shaft, and means for adjusting the driven shaft to move the gear thereon into or out of engagement withv the high or .low speed loose gears.

opposed surfaces of the casingy sect-ions 2 and 3. Each crank shaft has pistons operating in said 2. A ymotor comprising a main casing, a transverse gear casing at one .side thereof, sets of alined cylinders on each side of the center of the main casing, pistons working in said Cylinders, a (frank shait jfor 'eafch set of pistons and to which the pistons are coupled, said shaft-s being journaled in the main casing and havingextended-end portions extending; into the gear easing and jonrnaled therein, a driven vsha-t `jour-naled in the gear oasing'het-ween and :paralllel with `the vextended end :portions of the crank shafts, high and low 'speed .-'geairs fixed to the extended r`ends of the crank shaft, coactin-g high and *low speed-gears "loose on said driven shaft, a hollow shaft of sleeve slidable on and rotatable with the driven shaft and through 'one 'of lthe 'latter named gears,

a. clutch carried by said hollow sleeve or shaft and movable thereby to enga-ge either of thefgears on the driven shaft to fix the saine to the driven shaft, and means tor shifting' said hollow sleeve or shaft.

In testimony whereof Ialiix 'my signature.

MANUEL HUMBERTO PEREZ. 

